Use the 220 for a sump... You already have it!Painting done. Tile is down. Electrical outlets, exhaust fan, and HVAC returns all finished. Hope to grout the tile today and then waiting on tank to be ready for pickup. I have a dedicated space 6ft long against the side wall for the sump. I am having troubles deciding on what to buy. My 220gal has the Emerald 39 but I know that will be too small for this new tank. Any suggestions? The tank will have two external overflow boxes with 6 total 1.5" drains. I would like to put two return pumps in for redundancy and will have 4 total loc line returns. Other water flow in tank will be achieved with Gyres.